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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c62d4bf8ad63e2d0a51c0d41e925d9145ebf28637acaeeef0c11e19ca11144d8' 
  AND token = 'kKtIYk3cxODrmNaAqWSrNEMF91n5L/No54cTLs8CEuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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