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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47b67de3395cd24ca9d7597a09c1ceb32612a0ab924642df774afd5fa8ae82e2' 
  AND token = '/BJE/KDZBOxpirCTH2s0ePRvEcqDiRHggfSRCZ4MiSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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