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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1c2d7c41b4ff3c71b30c308e1fd2f7009564e3175d69b8ffa3997f102aea2da' 
  AND token = 'VAHLzH0EpJT3OMg3/kYM4XB94rzZ5IA1QJ7C6T7XPoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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