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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2eaa8d786b99d3f0e55f9a02d3e304cf4b90312fe255412423b38c20ddcf2bbc' 
  AND token = 'oQfbf0NRQJpRfdpMxXR2Ye4Jv3hqLgdP47p41s3xbX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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