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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7f43c8ed02ac49184bc481bb3fbb617f4c4ac57e827cc01b1acd9b07d9e3c1d' 
  AND token = 'Km0sl6ovDBOenXRDU+v+hUFWABydseI+4IdTIuOzqgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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