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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '074411ed6ad2df1905fcd656cf85ee9ea1c2b49b02bd2eec6e7c0d0efddacef6' 
  AND token = 'yGf96TJZHO66pnX6NUq0mzuDyGWO+1RpBGrWay7fOxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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