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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edfdc9dbabba96eb9f3592059c7e832cdc238d728ad3040d1a628ebebe40b1c8' 
  AND token = 'EaHPLWX6wuCi1ou/cq/UMZHDRkC3HO+WUwjis7gK9zc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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