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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abe6e1080a75906f66673dd1124f9ea0687ece862eaac43b6cd9a4f1221e0d5d' 
  AND token = 'NAxFINmS0F3ByFFrkocQbI+w6qusT1oFqDZ0yfDIg0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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