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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e372d95243b9f25c07f2d2335b2206f7fffe69283324c0c117f8fee5f4bddc7' 
  AND token = 'qsAYrWc2TyYxO8U9B/6TD9ERFiFOnPavdpvMLtkGpZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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