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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94318c392f5507f46a567c26aa525b91ceccd84d715cd1c2572cb535c6aae819' 
  AND token = 'iuXpi7TiyL/qmXygGSPMU3tSxvbaP2YQf/Qj/HlL/ZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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