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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a2dd0b2c8cc24aeab662e55ed7594dbd8f910ce7e4b3eaeceaef633c759a3cf' 
  AND token = 'cm+OdsUlBPxLpM71e8CkKjB8uk60RlBRZEwLcQ/n09E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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