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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28c6e362bae8f187cca6d1ab0075e6b42dbffb1b000c0923aa67d5eae2fdb6fe' 
  AND token = 'NPa1g9aiUfoRZxibiaQ713JleHADspcPohjGeh1QSlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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