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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22043018717d9080fe0ce9592e7ae5fc3b33b65a008caaa10e8a273a8c26bbcc' 
  AND token = 'Bnyr4+JjA3A0R70fVL5ZLBpiNxxdhTSne5isU/fRypI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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