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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8670109d2a465600d334925e36cae0f58bc8ce8c70af972c8403fc1ac9328a75' 
  AND token = '5K7rMfv8q3GdRny+oQWiwX7OAFxm1C5dGLDmR96SVDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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