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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f3de27a13867899cb33d2215cbca001212df05e3c150bf23d8e6e9314a95b0a' 
  AND token = 'dL3DV0XKCc6dLRCGUc63beMUSrzBs1aA71x9ZsIoGYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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