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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8949aa4eefb0789f357c523f5ad0f18cbf6aefd18f37b4f41a0da32713cfd18b' 
  AND token = 'tdIHMOAyoMDVWaoc4t9xP4y1UKXw2U8BYSLpCeQQpLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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