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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c9ce3d8ae3feb9d4d1d3fcf48a382cd4e7a0871315ec6261acab8199fb8cf3c1' 
  AND token = 'aeJsmRIRLaSWrv8HHC6n7rr/OwoqGDI7FQrdFOU+rCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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