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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4bba70e71fbb990974e5c98e8db481c4301a1d99c7219e682ee2f3a07a43f10c' 
  AND token = 'PgaftKnqLi69SXudud5vsROfRbMGqajx4Qw8Pu+nbLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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