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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e36ae7770e9686fb61c08e4b3f1f3e61bf3f2b0768a34f25d158011216c7055' 
  AND token = 'Cg2aQ4UsTgdNgSY2SwBf0e14h64ES/1pnxAlurCZrOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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