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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd82207a34cdf898165bdf8f52555e7fe927318249f12e03367b42a2ef70d510' 
  AND token = 'a5XAWal8HPGNd4D2YY0l/IRIw1UcnO1Q+kmNgMm8OGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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