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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a10e99078f15d93471b53c3b604b3a431359f969c8bdabbe3bc5ab85200fb0c' 
  AND token = 'HWrgIsQ7Cj3IBgj9PHkjsTK0prMScYvhbOr7B6R/m/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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