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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb88c215b9bbf198619af75a5376cc0de0dcb1bba7417e235c61d23df0e1ea75' 
  AND token = 'PBoh4RxKZIVtDF4n5ART012aPnicLvv95DYrSgkl2ZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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