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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc02ba85e1d5370b39abfc594860e6a732ac55915d823dc3b26160ce77c73162' 
  AND token = 'AZlT46JAIZEPQ/0kNcyhf5stzmL8JGlqXklkCqGeXKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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