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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f90e13ced1e0249e88e4bd6ec211b0cc82699b7031066f8d0b9e1a267b5a481' 
  AND token = 'm6za48b2Vh6h21cIK3pM/akeiyYqq6u1kASS2Rvl1q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}