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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23d14b9e2087196e98e5fd137715343d22e02ccb06e1c5e57f6301bfb022096a' 
  AND token = 'fNalptTur1pihmQ5Trizh04MNWE8ka15WPfGnRTR3pg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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