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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a42a413301f8e9948fe358fdb7c2fd1af4bd03e8ba098ff1d096aff01f11b32' 
  AND token = 'TCCbV9t9AAr+kvnsO1DmAdCGXBSPaNBvtBEenH9J/a0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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