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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cc653769a3f1ed824bb441ac88c5dd65b2700bea38019675d4c1cfbd4424cc6' 
  AND token = 'fZNyMZdbaVqgdx2J3go6baOqcpFo19srpv6UXrA8WXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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