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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd93eb2601312f3e3f5ea1bf0a15c33710cc5046650b38ccc0013e7eecde4ddc1' 
  AND token = 'spzPzR1K97RTR52vt2yNypTPV3FJViQQk5t9AI8SHTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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