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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0da20c0dce732d819816f2aa457c3706a00c86af7798cd9972dd88e29a977eb3' 
  AND token = '2vzdQba7sHDmm0LvphrgQSUAB89Jri4m/So1wdQPZeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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