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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bba485e67a9ee24fe92ca7ee3e998298ecfc8bd7e8282d5f5982674c5954d5f' 
  AND token = 'M1Bw7vjBlImH73dSpO1JACAb8rSlkHE9rp1Ik7r7eeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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