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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f62d29b89f4bc03da7c9cd883d3b97dc57ba9739e11b46ccfaa817a3bc8622da' 
  AND token = 'EAfNx665pHQ4iihTizVqK018XG1pIklGQQqTg42Tisw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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