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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d1580473d3fcc2d1ba55da994860af881d11c00110e4c0648f4e7b1b763aeee' 
  AND token = 'o1dr5ZqPF+BpM702RJlTNo7/KPInZsSNvoKVj9Yw62I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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