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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab4b8f981dca75efa7bfbd64141ad19e79cdc2b2526efa42718866f21b9732be' 
  AND token = 'tcHAbRuLZ98/ml2uaoT+H/qlyT/K6Fd4Lqc597oH60E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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