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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9b364dd4b714aea0871f30c26d667baf744ef8e742ec6e34d245955a62d299f0' 
  AND token = 'OFF9gpxIp78hF2HnsoKCJdnrOpM9H+xp1kmmeg0Brr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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