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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '75a1c48c94dd6da01d242f58e6a0bd710c528393f20550497a62fd48c96674f9' 
  AND token = '2Jw/RtTdoezAHe34es3QOsBd2sdfXq4oj1FNd8lhUaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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