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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c6b671dea958dee4bac67245ba2a8115187e0c90fe317079745e55a8cbb73b1' 
  AND token = 'oZ4ku+Hg1ALyDF4hDy9eTIyFTSbcvUzo3v2SegA/pL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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