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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '318b02bc21aee1c19b54367478b38f76317fa722997e2938e90af48840abe087' 
  AND token = 'Cgmha3uoYyVKAWyAbtjlgeKslpsmFg0AnpLXgFzdukY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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