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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb5ca0b24c941e14c4a6a55bb786bce42df8142b1288de9a49cac4d08544346d' 
  AND token = 'FFFZC2Od4fO89o8rY1zdsaSRg8RhS8YPlywS4V7AcRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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