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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03916e53dc03dcf725f7267cf3954faadf15e3b083ed842ae5baa6b1a23e76d3' 
  AND token = 'gBdVI7X14zInlexEV1hCvX40FVCJo8FjoYz7CT3NkK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00138

JSON explain

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