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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07157f46c224c91edb1dd01525ab3b97e0dad2a95c7a7d870b6b46f1df6b707f' 
  AND token = 'nK/YKfJc7z3B0ssVSKZofyexFQPlDfUJDmCBG70FzRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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