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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbe641759b80fcdca3a326dc03b0f2fbac09390ae0645d006f3aeb0f594be926' 
  AND token = '5yLkw/4JOSjQc46q6LM+Jotr0S944zXjyuIwHelR9iM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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