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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ef3d34164f486950cf6844bdb0a382fd985b8534732e2493c382c27301d310e' 
  AND token = 'Wly9Mth154Fpi4w3uNQEiELfsL4Xm8K5rz+4BpEv3VA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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