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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1809d8e7099f2d3abab83ea5657ae7cff2525ccca0b695935d32d69247049449' 
  AND token = 'OplLjoNNRiw0dy5zIcSp0vAXL7LyKp+QHS0AlbHbfqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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