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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe01a660d47dda5f0aaf04aa59144bee95ee02eb0bf9317add40cdedfe1389c3' 
  AND token = 'ZiEgoUId1fBeg8G64laUXxrZIXurhl5RFHDFbJnspOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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