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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '333cc659ccbae4a81a0a068659fe1de9ab26c502bb205860b1ef5f903e424452' 
  AND token = 'FoJnhN/xd8WU/SmJTWgOs1ROTe7460bTCH32ystjF+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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