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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23b5ea7a2740bfbcff3913dc4f20c8733e92f285f37cc650ee4b46085406bd78' 
  AND token = 'a60Re05flBUh1mUo0Vu5W9zWUumCW//O8bjNiX4o7H0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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