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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ffecef3e80ac977fce06ef4394dc34c4b464886b601a5eef2a2555b34c543f6' 
  AND token = 'WGhBGwZ15XX1ycK0arBcmPnm7BCtw0IGOYFqx3vMtyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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