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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e2c6afe2568fa613e81441179442f91ca72803fa79c667f7c3e62559843a90c' 
  AND token = 'LARPhyopwWpfKI+d1TKoEuqnEKccWR/xLwLB3l2UyZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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