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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83032c0c8263840cb2ce755ef86b32e68640bbc0982a727635c14f2da8b48edf' 
  AND token = '5eQ4WC29ApzUOGFGFAKQqrHT93iH1jVAH7N+YbwiWrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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