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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5eaa3714b1607182d24e774bb8ebdad35e2c6c67c860c0f4238eb8bc0da53c60' 
  AND token = 'mDs7p0fgdbyzehI090D4DGlrmPqyiEnMBnRs5H7Z3K8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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