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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02c07ac63ec2d438a9697c5af50dd550fd06722ff4aa1dbc6b9465091d4495a1' 
  AND token = 'fghjEXWxRMyftK8a0/FmjSn4TuRTAage+wf4Bu+recU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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