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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc04f99fcb8a7bc07d349f29cdfa894c73c38ea556bded13a3c30440d4aaac25' 
  AND token = 'Bin7dxhX2ldovoV4GXWUFe5aGBK0TbZpgSx1zD4XZBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00097

JSON explain

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