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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cf9ddad5c6059decd8e14b3e1d3c93cb4b478ca375dd3a282db6711e5ce7ac9' 
  AND token = 'ucRi9h0xA3KSflzIni810PrRBWGvwDm+/3gm56mINpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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