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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '49f90a37146927740d24ee9c7f86ccdf66b6b6903be1ae5a13220ad09478e2e7' 
  AND token = 'IgGoiTRT23lzoq47nPmeBagCu25hFLRgC7ILiPpCooM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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