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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '11482431d735f197f8e65e6bfbbe71bd2c7e7e0e55f426f7be034b1da45d9700' 
  AND token = 'Uw80rp4bxEJCIKWetXiyccstMKcx1s7zcS3dqP6vp+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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