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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bbb48ba586e7108447184ebe5529cfe945afd2c0223bb97c984419b60912f04' 
  AND token = 'fxxh7yddCmm4y1rxAlpuPOYIkPHhN4I7AsnXe4Hxg2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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