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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ed220209fa7813f7ef73a02cbaa309ceb93f2f87b08dc84b91b269ecb827301' 
  AND token = 'XfbnI6LcvZrjNKN17nFPhsl05H4Lk1Jc5/p3bKZk7To=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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