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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23cc9233051494fcb2c4268bba90ee266fe9418ba072f4353cc0e746100732d0' 
  AND token = 'db2D+4sbplww77AKMFYCO/Iph9GHjE7Xl7XP4Wqx80g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00097

JSON explain

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