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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78059e79bf1c8ccb009601b3642bfd93bf903619a3c09204d85c9e711a73c404' 
  AND token = 'GlYzm2RyIrIwaLwAGdYQxDsDpgRJ3gkX9BVX2rF1srk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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